>How many competitors to Windows popped up after the microsoft antitrust suit? Is there a "windows specific browser" to compete with Edge or IE which is from a former microsoft company?

I don't think this one really illustrates your point very well. There are no former Microsoft companies because Microsoft was never broken up. That was actually on the agenda until we elected a Republican president who decided MS just needed a slap on the wrist. Add this to the "ways in which the Bush administration hosed America" pile.